Caesalpinia plant named ‘Mnstamepa’

ABSTRACT

A new and distinct hybrid of the genus  Caesalpinia  is provided. This hybrid has been named ‘Mnstamepa’ for a cultivar name and is trademarked as Sierra Sun™. The new variety is a product of a cross between  Caesalpinia mexicana  and  Caesalpinia palmeri  which occurred in the year 1996. The Genus/species designation for the plant is  Caesalpinia mexicana×palmer.  The new variety was selected because it displays a uniquely different flower color previously unavailable in the genus, and a more open less twiggy habit with a finer leaf structure that either of its parents.

Latin name of the genus and species of the plant claimed: Caesalpiniamexicana×palmeri.

Varietal denomination

Mnstamepa

BACKGROUND OF THE INVENTION

This cultivar ‘Mnstamepa’ variety was selected by the inventor as asingle plant that was the result of a chance hybrid between an unnamedplant of Caesalpinia mexicana with another unnamed plant of Caesalpiniapalmeri. The Caesalpinia mexicana plant and the Caesalpinia palmeriplant are unpatented selections originally from native populations. TheCaesalpinia mexicana is the female parent in the cross that yielded theseedling which is the Caesalpinia plant ‘Mnstamepa’, the subject of thisplant patent application.

BRIEF SUMMARY OF INVENTION

The new variety Caesalpinia ‘Mnstamepa’ is distinguishable from itsparents by displaying a distinctively different flower color (and otherattributes) previously unavailable in the genus Caesalpinia. This coloris displayed in the drawing marked FIG. 3.

The selected seedling was grown for 20 years after its discovery byasexual propagation carried out in Glendale, Ariz. The new varietyreproduces true to type through asexual reproduction. The distinctivehabit and flowering characteristic remain constant in each successivecrop of grafted plants. The following detailed botanical description istaken from plants that have been growing in containers for at least 12months. The containers were 24 inch boxes that were irrigated with dripemitters and located outdoors in Glendale, Ariz. in a position of fullsun.

The Caesalpinia×‘Mnstamepa’ grew from a chance seedling located along anirrigation canal in Glendale, Ariz., which grew at a moderate growthrate. At an age of 20 years, the tree was observed with an uprightgrowth habit to 5 meters. The new ‘Mnstamepa’ variety exhibits a moreupright character with fewer side branches than the parents to achieve aplant width of 5 meters. The ‘Mnstamepa’ plant is deciduous attemperature exposures below about 25° F. The maximum winter hardiness isUSDA Zone 8.

This hybrid is not known to be susceptible to any soil borne pathogensor to any foliar disease. The plant has not been observed to suffer fromany insect infestations.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying photographs show typical specimens of plant parts ofthe new variety in color as nearly true as is reasonably possible toaccomplish from conventional photographic procedures.

FIG. 1 shows a bipinnately compound leaf in early summer.

FIG. 2 shows a close up of the flower during the summer season.

FIG. 3 shows a close up of the flower during the summer season.

FIG. 4 shows a close up of the inflorescence and individual flowerduring the summer season.

FIG. 5 shows a close up of the fruit.

The color chart used in the identification of colors described herein isThe R.H.S. Colour Chart of The Royal Horticultural Society, London,England. The plants described were grown during 2007 at Glendale, Ariz.

DETAILED BOTANICAL DESCRIPTION

-   Description of the plant:    -   -   Classification.—Caesalpinia Hybrid.        -   Plant form.—Tree.        -   Plant height.—To 5 meters.        -   Plant width.—To 5 meters.        -   Plant growth habit.—Perennial, upright woody tree shrub with            open clear trunk similar to Caesalpinia mexicana habit.        -   Stem/lateral branch diameter.—2 centimeters.        -   Stem/lateral branch internode.—4 centimeters.-   Foliage description:    -   -   Leaf arrangement.—Alternate.        -   Stipules.—Small.        -   Petiole and rachis length.—25–30 mm.        -   Petiole diameter.—1 mm.        -   Petiole color.—RHS 144A Blushed with RHS 46A.        -   Leaf shape.—Odd bipinnately compound.        -   Leaf length.—Pinnae.—3–4 pairs, 11–12 cm long.        -   Leaf width.—9-10 cm.        -   Leaflets.—Even pinnate; 3–4 pairs; 15–20 mm long, 10 mm            wide, rounded-elliptic, to obovate.        -   Leaflet base.—Asymmetrically cuneate.        -   Leaflet apex.—Asymmetrically obtuse.        -   Leaflet pubescence.—Glabrous.        -   Leaflet margin.—Entire.        -   Leaflet color.—RHS 137A.        -   Rachis color.—RHS 144A.        -   Stem.—Distinct lenticels.-   Leaves are seasonally uniform in these measurements and colors    except in winter when deciduous. Generally deciduous at temperature    exposures below 25° F.-   Description of the flower:    -   -   Inflorescence type.—Terminal and axillary raceme to 15 cm            with 20–35 flowers.        -   Peduncle length.—15–20 mm.        -   Peduncle diameter.—1 mm.        -   Peduncle color.—RHS 146C blushed with RHS 184B.        -   Calyx.—Pubescent, 5 Sepals RHS 181B striped with RHS 152C on            abaxial side, RHS 181B on adaxial side.        -   Calyx shape.—Calyx segments oblong.        -   Sepals.—Oblong 7 mm in length, 4 mm wide.        -   Calyx length.—1 cm.        -   Calyx width.—17–20 mm.        -   Calyx pubescence.—Pubescent.        -   Corolla shape.—Bilaterally symmetrical.        -   Corolla height.—15 mm.        -   Corolla diameter.—22–25 mm.        -   Corolla description.—Banner RHS 9A with large patch of RHS            46C in the center of the adaxial surface. Banner petal 10 mm            long and 9 mm wide. Scattered stalked glands on the margin            and both surfaces. Wing petals RHS 9A, the claw 2 mm long            with stalked glands along the margin; the blade obovate, 7            mm long by 5 mm wide. Keel petal RHS 9A with the claw 2 mm            long with stalked glands along the margin; blade obovate, 7            mm long by 5 mm wide.        -   Corolla color.—RHS 13A.        -   Corolla pubescence.—Glabrous.        -   Style length.—11 mm        -   Style color.—RHS 150C.        -   Stigma color.—RHS 165 B.        -   Stigma width.—1 mm.        -   Filament number.—10; distinct, flattened, curved upward,            pubescent along the margin, stalked glands present.        -   Filament length.—12–13 mm.        -   Filament color.—RHS 154C.        -   Anther length.—1 mm.        -   Anther color.—RHS 172D.        -   Pollen present.—Yes.        -   Pollen color.—RHS 14A.        -   Fruit.—Oblong acute 6–8 cm glabrous, 15 mm×65 mm, 4–6 seeds.

1. A new and distinct variety of Caesalpinia plant as herein illustratedand described.